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Drivers who want to drive combination vehicles must pass the combination vehicles test. The New Hampshire CDL combination test consists of 20 questions, and you'll need at least 16 correct answers to pass (80%). The test covers the combination vehicles section of the New Hampshire CDL Manual. Take this practice test now to prepare for the actual NH CDL combination test!
1. On front tires, tread should be at least:
4/32 inch
2/32 inch
4/16 inch
1/16 inch
2. Containerized loads:
should exceed gross weight and axle weight limits.
must be inspected before and after the trip.
are generally used for freight carried part way by rail or ship.
All of the above.
3. Empty trucks require _____ stopping distances because empty vehicles have ______ traction.
greater; more
greater; less
less; less
less; more
4. Which of the following may have reduced the clearances since the heights were posted at bridges and overpasses?
The weight of a cargo
Repaving of the road
5. Most heavy vehicles require ________ change gears.
double shifting
double clutching
single clutching
triple shifting
6. After supplying air to the trailer brake system, you should check the brake system for crossed air lines by:
applying and releasing the trailer brakes and listening for the sound of trailer brakes.
checking the air brake system pressure gauge for signs of major air loss.
shutting the engine off so you can hear the brakes.
All of the above.
7. When driving a 50 foot combination vehicle at 50 mph in ideal conditions, you should keep at least ____ seconds of space in front of you.
8. If your vehicle is equipped with air brakes, loss of air pressure in the emergency line causes:
the trailer emergency brakes to come on.
the trailer spring brakes to come on.
the speed of your vehicle to increase.
All of the above.
9. When uncoupling a trailer, after shutting off the trailer air supply to lock the trailer brakes, you should:
pull the tractor forward until the fifth-wheel comes out from under the trailer.
inspect the trailer supports.
immediately apply your tractor parking brakes.
back up gently to ease the pressure on the fifth-wheel locking jaws.
10. If there is a cargo fire in a van or box trailer, you should:
open the doors, especially if your cargo contains hazardous materials.
enlist the help of bystanders.
keep the doors shut.
keep driving until you reach help.
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NH CDL Combination Test

Number of questions: 20
Correct answers to pass:16
Passing score:80%
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